To assure the flight stability of small unmanned helicopter in wind environment,a combined control method based on active modeling and the traditional LQG control theory is presented,which can effectively adapt to model uncertainty.This method considers the wind disturbance on an unmanned helicopter as a random perturbation,and such disturbances is combined with the state of body model to consist the augmented state variables,then use real-time Kalman filter to estimate the disturbance feed back to the controller to achieve the reconstruction of the controller,thus realizing the unmanned helicopter stability control.The semi-decoupling model and the atmospheric turbulence model are established based on modeling theory,which is used in simulation.The results show that the method has some suppression on atmospheric turbulence.